Hello,
I am a past owner of two SIM I-5 integrateds ( didn't learn the first time around) and I honestly feel that this ''house sound'' that the SIM have is faulty to begin with. I tried desperately to match the I-5 with a host of speakers and cd players - I always had this exagerated bass, thin-sounding midrange and dry overall sound. I wish I had a kinder way of saying this - but I feel that Sim amplification often is the limiting factor. Nice cosmetics, but way overrated sonically speaking. Pop in a small electrocompaniet EC-3 integrated instead of the I-5, and watch a world of neutrality and flexibility open-up. I do not own this amp any longer, but it followed my two I-5's and it's no contest in this price range at least. As for the W3, why would you want more of the same?
Regards,
Mike